<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        
    </style>
</head>
<body>
    
</body>
<script>
    class Phone{
        constructor(brand,price){
            this.brand=brand;
            this.price=price
        }
        //父类成员属性
        call(){
            console.log("我可以打电话")
        }
    }
    class SmartPhone extends Phone{
        //构造方法
        constructor(brand,price,color,size){
          super(brand,price)
          this.color=color
          this.size=size
        }
        photo(){
           console.log("拍照")
        }
        playGame(){
            console.log("玩游戏")
        }
        call(){
            console.log("视频通话 ")
        }
    }
     const xiaomi=new SmartPhone("小米",799,"黑色","5.56cm")
     console.log(xiaomi)
</script>
</html>